burgess



(No Model.)

. O. M. BURGESS.

- KNOB ATTACHMENT. No. 503,450. Patented Aug. 15,1893.

UNITED STATES PATENT OFFICE.

CHARLES M. BURGESS, OF NEW BRITAIN, CONNECTICUT, ASSIGNOR TO THE RUSSELL & ERWIN MANUFACTURING COMPANY, OF SAME PLACE.

KNOB ATTACH M ENT.

SPECIFICATION forming part of Letters Patent No. 503,450, dated August 15, 1893.

Application filed May 20, 1893. Serial No. 474,884. (No model.)

To all whom it may concern; is screw threaded and is screwed upon the Be it known that 1, CHARLES M. BURGESS, shank 7 of the knob spindle. The sleeve is acitizen of the United States, residing at New provided with devices for connecting it with Britain, in the county of Hartford and State of a wrench or lever for rotating it, the same be- 5 Connecticut, have invented certain new and ing illustrated in the form of a ridge 14 havuseful Improvements in Knob Attachments, ing angular faces for the application of a of which the following is a specification. wrench. In order to prevent the collar 9 from My invention relates to improvements in being accidentallydetachedor displaced from knob attachments, and the objects of my imthe sleeve, 1 force a portion of the metal from [0 provement are simplicity and economy in eonthe sleeve into the groove 13 of the collar 9,

struction and convenience and efficiency of Fig. 2,as at 15 thereby permitting the sleeve the article. to be rotated upon the collar, while at the In the accompanying drawings: Figure 1 is same time they are held against longitudinal a side elevation of a portion of a spindle and movement.

15 a knob having my attachment. Fig. 2 is an In use the parts are placed substantially as enlarged longitudinal section thereof. Fig. shown in Fig. 2 but without the sleeve being 3 is a plan view of the holding jaw and its screwed up tightly. Theknobis then slipped collar. Fig. 4 is a face view of said collar. along on the spindle to the desired point, Fig. 5 is a longitudinal section of my attachafter which the sleeve is tightened up, there- 20 ment showing a slightly modified form, and by forcing the beveled face at the end of the Fig. 6 is a face view of the spring jaws for knob against the beveled end of the jaw 11 said modification. causing the inner face of the jaw to be firmly A designates a knob having the usual cenpressed against one side face of the spindle tral orifice for the spindle B and provided for holding the knob in position. WVllile I 25 with a screw threaded shank 7, the end of have shown only one jaw 11 and believe that which shank is beveled or counter sunk as at the same will securely hold the knob in place, 8, Fig. 2, upon one or more sides of its spindle it is of course, evident that other like jaws hole. For convenience, I prefer to so bevel may be added to the collar 9 on one or more the end of the shank upon all sides of the of the several sides of its spindle hole as may 0 spindle hole, as it can be done by means of a be desired.

revolving tool, but when only one holding WhileI have thus fardescribed a rigid jaw jaw is employed as in the construction first movably mounted on a collar, it is evident herein described, it is necessary to bevel the that substantially the same construction end of the shank upon one side only. might be employed in connection with one 35 9 designates a collar which is provided with or more spring jaws.

a square hole to fit the spindle B, and in its In Figs. 5 and 6, I have illustrated my imfaceI form the slot 10 to receive and hold one provement with spring jaws, the same being end of the holding jaw 11. This slot is prefformed of a single piece of sheet metal bent erably of a dovetailed form and made so narinto form. The base of these jaws is sub- 40 row that the heel of the jaw will not fall stantially of disk form with a central square through it into the spindle hole, while at the hole for the spindle, said base 99 serving as same time, the jaw is so loosely fitted in said a substitute for the collar 9 first described, slot as to have a swinging motion therein. and from this base the four spring jaws The collar 9 is provided with a shoulder 12 are arranged to project toward the counter- 45 and preferably with an annular groove 13. sunk end of the knob shank. The operation C designates a sleeve designed to slip over is the same as before described, that is to say, 9 5 the collar 9 and its holding jaw with one porscrewing up the sleeve forces the ends of the tion near its end engaging the shoulder 12 as jaws against the beveled faces at the end of shown in Fig.2. The other end of this sleeve the knob shank and thereby forces the jaws against the sides of the spindle for holding for forcing said jaw against the spindle, subthe knob thereon. stantially as described and for the purpose I claim as my invention specified. The herein described knob attachment, con- CHAS. M. BURGESS. 5 sistingof the screw threaded knob shank hav- Witnesses:

ing a beveled face at its end, the collar carry- T. S. BISHOP,

ing a holding jaw, and the threaded sleeve M. S. WIARD. 

